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Thermocouple, preparation method thereof, and electric appliance

A technology of thermocouples and electrical appliances, applied in instruments, thermometers with direct heat-sensitive electric/magnetic elements, electrolytic coatings, etc., can solve problems such as insulation failure, poor insulation performance, and poor bonding force of substrates, and achieve simple Anodizing treatment, performance-enhancing effect

Active Publication Date: 2019-08-16
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The inventors found that the insulating layer in the current thin-film thermocouple generally has problems such as poor insulation performance, poor high temperature resistance, and poor bonding force with the substrate.
After in-depth research and a large number of experiments, the inventor found that this is mainly due to the fact that when preparing a thin-film thermocouple, it is first necessary to prepare an insulating layer on the metal substrate, and the current insulating layer is generally coated with organic matter or sintered ceramics. Preparation, on the one hand, the insulating layer prepared by the above method has poor high temperature resistance; The possibility of insulation failure, resulting in poor insulation performance and other problems

Method used

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  • Thermocouple, preparation method thereof, and electric appliance
  • Thermocouple, preparation method thereof, and electric appliance
  • Thermocouple, preparation method thereof, and electric appliance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Methods of Making Thermocouples

[0137]1. The stainless steel alloy (200*200*1mm) is sandblasted with 80 mesh brown corundum, and then the surface is insulated;

[0138] 2. Covering the first mask plate with the hollowed out first electrode pattern on the stainless steel alloy whose surface has been insulated;

[0139] 3. Remove the first wire (the composition is Ni 90 Cr 10 , with a diameter of 2.0mm) on the oxidized part of the surface;

[0140] 4. The carrier gas is N 2 Under the condition of , arc spraying equipment is used to spray the first wire material on the ceramic covering the first mask plate, the spraying voltage is 20V, the current is 100A, the spraying distance is 300mm, the spraying air pressure is 0.6MPa, and the moving speed of the spray gun is 100mm / S, forming the first electrode of the thermocouple, with an average thickness of 35μm and a resistance of 150Ω;

[0141] 5. Cover the second mask plate with the hollowed-out second electrode pattern ...

Embodiment 2

[0146] Methods of Making Thermocouples

[0147] 1. Insulate the surface of aluminum alloy (200*400*2mm);

[0148] 2. Covering the first mask plate with the hollowed-out first electrode pattern on the aluminum alloy whose surface has been insulated;

[0149] 3. removing the oxidized part on the surface of the first wire (composition is Cu, diameter is 1.8mm);

[0150] 4. Under the condition that the carrier gas is Ar, arc spraying equipment is used to spray the first wire material on the ceramics covered with the first mask plate, the spraying voltage is 40V, the current is 100A, the spraying distance is 400mm, and the spraying air pressure is 0.4MPa, the moving speed of the spray gun is 100mm / S, forming the first electrode of the thermocouple, with an average thickness of 25μm and a resistance of 150Ω;

[0151] 5. Cover the second mask plate with the hollowed-out second electrode pattern on the aluminum alloy whose surface has been insulated, and the hollowed-out pattern on ...

Embodiment 3

[0156] Methods of Making Thermocouples

[0157] 1. The stainless steel alloy (200*200*1mm) is sandblasted with 100 mesh brown corundum, and then the surface is insulated;

[0158] 2. Covering the first mask plate with the hollowed out first electrode pattern on the stainless steel alloy whose surface has been insulated;

[0159] 3. Remove the first wire (the composition is Ni 90 Cr 10 , with a diameter of 2.0mm) on the oxidized part of the surface;

[0160] 4. The carrier gas is N 2 Under the condition of , arc spraying equipment is used to spray the first wire material on the ceramic covering the first mask plate, the spraying voltage is 20V, the current is 100A, the spraying distance is 300mm, the spraying air pressure is 0.6MPa, and the moving speed of the spray gun is 100mm / S, forming the first electrode of the thermocouple, with an average thickness of 35μm and a resistance of 150Ω;

[0161] 5. Cover the second mask plate with the hollowed-out second electrode patter...

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Abstract

The invention discloses a thermocouple, a preparation method thereof, and an electric appliance. The thermocouple comprises a metal substrate, an oxide film layer, an insulation coating and an electrode layer; at least part of the surface of the metal substrate is covered with the oxide film layer, the surface of the oxide film layer is covered with the insulation coating, and the electrode layeris arranged on the side, away from the metal substrate, of the insulation coating, wherein the pore diameter of the insulation coating is not greater than 10 nm. Therefore, the binding performance ofthe insulation coating and the metal substrate in the thermocouple is excellent, the insulation coating is good in high temperature resistance and corrosion resistance, and stability is good; and theinsulation coating is good in compactness and excellent in insulation performance.

Description

technical field [0001] The invention relates to the technical field of household electrical appliances, in particular to a thermocouple, a preparation method thereof, and an electrical appliance. Background technique [0002] With the transformation and upgrading of the home appliance industry and technological development, intelligent appliances have become an important development direction of home appliance technology. Among them, the thin-film thermocouple has become an advanced surface temperature measurement technology due to its advantages of small mass, fast response speed, small environmental disturbance, and no damage to the structure of the tested part. It can be widely used in the surface temperature measurement of household appliances. , Real-time temperature display, can also effectively improve product performance and user experience. Compared with traditional bulk thermocouple materials, thin-film thermocouples can be directly prepared on the surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/02C23C4/134C23C4/131C23C4/129C23C4/06C23C4/08G01K7/02A47J36/00
CPCC25D11/02C25D11/026C23C4/134C23C4/131C23C4/129C23C4/06C23C4/08G01K7/02A47J36/00
Inventor 成乐王慷慨熊玉明
Owner GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD
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